Electromagnetic relay

The electromagnetic relay uses a high thermal conductivity member to maintain low temperatures and prevent condensation at contact points, addressing shape constraints and ensuring reliable operation in low-temperature environments.

WO2026133856A1 Publication Date: 2026-06-25DENSO ELECTRONICS CORP ANJO CITY +1
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Patent Information

Application Number
PCT/JP2025/040804
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-12-19
Filing Date
2025-11-21
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing electromagnetic relays face challenges in maintaining low temperatures to prevent condensation at contact points, particularly in low-temperature environments, due to constraints on the shape of the heat conductive member, which can lead to poor conductivity and potential freezing.

Method used

An electromagnetic relay design featuring a thermal conductive member with one surface attached to the case and another exposed to the surrounding space, having higher thermal conductivity than the case, allowing it to function as a cold storage material and maintain low temperatures, thus suppressing condensation at contact points.

Benefits of technology

The design effectively keeps the relay case at a low temperature for extended periods, reducing condensation and maintaining conductivity by using a heat conductive member that is not constrained by shape, enhancing cooling performance and preventing freezing issues.

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Abstract

This electromagnetic relay comprises: an electromagnetic coil (21) that generates a magnetic force by being energized; a first contact part (14); and a second contact part (121) that comes into contact with or separates from the first contact part as the electromagnetic coil is switched between being energized and not being energized, thereby opening / closing an energization path. In addition, the electromagnetic relay also comprises: a case (30) that accommodates the electromagnetic coil, the first contact part, and the second contact part therein; and heat-conducting members (44, 45) disposed outside the case. The heat-conducting members have one surface (441, 451) joined to the case and the other surface (442, 452) provided on the opposite side to the one surface and exposed to a space (30b) around the case, and have a higher thermal conductivity than the case.
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